using System;
using System.Collections.Generic;
using System.Linq;

class Massiivitehted3 {
    public static void Main(string[] arg) {
            int[] vanapaaskyla={10, 14, 18};
            int[] haava={18};
            int[] kalev={5, 14, 18, 20, 36};
            Console.WriteLine(string.Join(" ", vanapaaskyla.Intersect(haava).
                              Intersect(kalev).ToArray<int>()));
            Console.WriteLine(string.Join(" ", 
                     vanapaaskyla.Except(haava).ToArray<int>()));
            Console.WriteLine(string.Join(" ", vanapaaskyla.Union(haava).
                              Union(kalev).ToArray<int>()));
    }
}